Panel



FIG. 1 is a perspective view of the panel, as seen from above and to the right;

FIG. 2 is a front view of the panel;

FIG. 3 is a left view of the panel;

FIG. 4 is a right view of the panel;

FIG. 5 is a bottom view of the panel; and,

FIG. 6 is a top view of the panel.

The phantom lines throughout the figures are included for the purpose of illustrating portions of the panel that form no part of the claimed design. 

The ornamental design for a panel, as shown and described. 